Stock Trading Canary

United States · SEC Form 4 · Snapshot date: 2026-10-18 · Built: 2026-10-18 · 中文

← United States · Coverage record

US · SEC FORM 4

NEPHROS INC

NEPH · Nasdaq · CIK 0001196298 · Healthcare · Medical Instruments & Supplies

INSIDER SIGNAL

No active buy signal

0 qualifying P purchase groups
in the current 180-day scoring window

8 Form 4 transaction lines observed in the same window
0 sales · 8 option, withholding, award, gift or other lines

Last qualifying purchase2024-05-30 · Amron Arthur H · $6.7K

WHY NO ACTIVE SIGNAL?

Purchase activityNone
Recent buyingNone
Recent salesNone
Buy signal statusInactive
Score anatomy

No score is calculated because there is no qualifying purchase in the active window. Unavailable inputs are not treated as zero or as a bearish signal.

ClusterNot calculated
Purchase sizeNot calculated
RoleNot calculated
RecencyNot calculated
ConvictionNot calculated

Why is there no score?

  • No qualifying open-market purchase supplies cluster, size, role, recency or conviction inputs.
  • Sales and other Form 4 activity remain visible as context and do not create a negative score.

Sales and other Form 4 activity are shown separately and do not create a negative buy signal. Absence of buying is not scored as bearish.

Insider activity timeline

Owner lanes show the latest 180 days. Symbol shape identifies the transaction type; sales remain context only.

AprMayJunJulAugSepOct
DAVIDSON CHARLES E; JACOBS JOSEPH; WEXFORD CAPITAL LP; Wexford GP LLCTenPercentOwner
○○
Amron Arthur HDirector
○○
Amron Arthur H; Amron Holdings LLCDirector
○
● Purchase▼ Sale○ Other

—

Purchase breadth, concentration & cluster buying

These modules activate when qualifying purchases enter the 180-day research window.

SIGNAL HISTORY

No recorded active-signal snapshot

Scores are archived only when the company qualifies for a published US buy-signal snapshot. Last qualifying purchase: 2024-05-30 · Amron Arthur H.

Recent Form 4 activity

0Purchases
0Sales
14Other Form 4 lines
11SEC filings · 365 days
BUYING0 qualifying P line(s) · 180 days
SELLING0 sale line(s) · context only
OTHER8 exercise / withholding / award / gift / other lines
10b5-1 / PLANNEDNot assessed

P is an open-market or private purchase. S is a sale. M, F, A and G usually describe exercises, tax withholding, awards and gifts. These categories remain visually separate.

Market context

Market context has not been captured for this ticker yet. The daily market-context job processes the US universe in rotating batches.

Short interest

Short interest is external context reported to FINRA by broker-dealers. It does not affect the Insider Signal.

Shares short
25,302
Previous report
46,400
Avg daily volume
18,272
Days to cover
1.4

FINRA settlement date: 2026-09-30 · Captured 2026-10-12 · FINRA equity short interest ↗. A share count, published about a week after each of two settlement dates a month; not a percentage of shares outstanding.

Historical equity purchases

Qualifying code P transactions in the local Form 4 history, including purchases outside the current signal window.

Transaction dateReporting ownerTypeSecuritySharesAvg. priceApprox. valueSource
2024-05-30Amron Arthur HPurchase (P)Common Stock3,000USD 2.24USD 6,720SEC filing ↗
2024-05-28Amron Arthur HPurchase (P)Common Stock2,000USD 2.22USD 4,440SEC filing ↗
2024-05-16Banks Robert R. Jr.Purchase (P)Common Stock50,000USD 2.24USD 112,000SEC filing ↗
2024-03-12Amron Arthur HPurchase (P)Common stock7,000USD 2.45USD 17,150SEC filing ↗
2023-12-07Banks Robert R. Jr.Purchase (P)Common Stock18,000USD 2.20USD 39,600SEC filing ↗
2023-08-15Banks Robert R. Jr.Purchase (P)Common Stock1,901USD 1.69USD 3,213SEC filing ↗
2023-08-14Banks Robert R. Jr.Purchase (P)Common Stock99USD 1.50USD 148SEC filing ↗
2021-08-20Lobo Wesley S.Purchase (P)Common Stock1,000USD 7.92USD 7,920SEC filing ↗
2021-08-18Gwydir TomPurchase (P)Common Stock5,000USD 7.64USD 38,200SEC filing ↗
2021-08-18Astor AndrewPurchase (P)Common Stock2,500USD 7.77USD 19,425SEC filing ↗
2021-08-17Astor AndrewPurchase (P)Common Stock2,500USD 7.67USD 19,175SEC filing ↗
2020-11-19Astor AndrewPurchase (P)Common Stock1,000USD 5.87USD 5,870SEC filing ↗
2020-11-18Spandow Oliver J.Purchase (P)Common Stock1,500USD 5.83USD 8,745SEC filing ↗
2020-08-19Astor AndrewPurchase (P)Common Stock950USD 7.40USD 7,030SEC filing ↗
2020-05-28Astor AndrewPurchase (P)Common Stock1,000USD 6.96USD 6,960SEC filing ↗

Form 4 evidence

14 transaction lines in the latest 365-day window; 68 in local history.

DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-09-14DAVIDSON CHARLES E; JACOBS JOSEPH; WEXFORD CAPITAL LP; Wexford GP LLCJ (J)Common Stock3,377,821USD 0.03USD 89,704SEC filing ↗
2026-09-14Amron Arthur H; Amron Holdings LLCJ (J)Common Stock43,295USD 2.07USD 89,704SEC filing ↗
2026-08-18DAVIDSON CHARLES E; JACOBS JOSEPH; WEXFORD CAPITAL LP; Wexford GP LLCOption exercise / conversion (M)Common Stock812USD 3.60USD 2,923SEC filing ↗
Show recent Form 4 evidence (11 grouped rows)
DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-09-14DAVIDSON CHARLES E; JACOBS JOSEPH; WEXFORD CAPITAL LP; Wexford GP LLCJ (J)Common Stock3,377,821USD 0.03USD 89,704SEC filing ↗
2026-09-14Amron Arthur H; Amron Holdings LLCJ (J)Common Stock43,295USD 2.07USD 89,704SEC filing ↗
2026-08-18DAVIDSON CHARLES E; JACOBS JOSEPH; WEXFORD CAPITAL LP; Wexford GP LLCOption exercise / conversion (M)Common Stock812USD 3.60USD 2,923SEC filing ↗
2026-08-12Amron Arthur HAward / grant (A)Common Stock2,418USD 0.00USD 0SEC filing ↗
2026-05-11Amron Arthur HAward / grant (A)Common Stock3,574USD 0.00USD 0SEC filing ↗
2026-03-23Krandel JudyOption exercise / conversion (M)Common Stock68,861USD 1.71USD 117,752SEC filing ↗
2026-03-23Banks Robert R. Jr.Option exercise / conversion (M)Common Stock120,000USD 1.44USD 172,800SEC filing ↗
2026-03-16Amron Arthur HAward / grant (A)Common Stock3,610USD 0.00USD 0SEC filing ↗
2025-11-10Spandow Oliver J.Award / grant (A)Common Stock8,036USD 0.00USD 0SEC filing ↗
2025-11-10Nettis Lisa MarieAward / grant (A)Common Stock1,622USD 0.00USD 0SEC filing ↗
2025-11-10Amron Arthur HAward / grant (A)Common Stock5,391USD 0.00USD 0SEC filing ↗

Multiple price lines in one filing are grouped and share-weighted. Price and value are blank when a grouped filing line lacks price evidence.

Snapshot & identity

Snapshot date2026-10-18
Ranking versionUS-v1.2
Data qualityPASS ELIGIBLE · —
TickerNEPH
CIK0001196298
SectorHealthcare
IndustryMedical Instruments & Supplies Yahoo Finance
SEC SIC3841 Surgical & Medical Instruments & Apparatus
ExchangeNasdaq

Data coverage

Local Form 4 history68 transaction lines from 2020-03-05 to 2026-09-14
19 P purchase lines · 0 S sale lines · 49 other lines
SEC company submissionsOpen SEC filings ↗

Local ledger as of 2026-10-18. Mapping status is an audit field and does not erase SEC filing evidence.